Article
Nanoscience & Nanotechnology
S. Zeisl, A. Lassnig, A. Hohenwarter, F. Mendez-Martin
Summary: The influence of severe plastic deformation on the hardness and precipitation behavior of a Co-free maraging steel was investigated in this study. It was found that severe plastic deformation transformed the microstructure, delayed austenite reversion, and accelerated and influenced the precipitation reaction, thus affecting the characteristics of intermetallic phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
X. Q. Rong, H. Guo, M. Enomoto, C. J. Shang
Summary: The addition of Al in the Fe-2Cu-1.5Mn-1.5Ni alloy was found to enhance Cu nucleation in the matrix and on dislocations, leading to a significant increase in hardness. The higher dislocation density in Al-containing steel may be attributed to a larger number of Cu particles delaying the recovery and annihilation of dislocations in the martensite matrix. Additionally, the concentrations of Cu and Mn in Cu clusters were lower, while those of Al and Ni were higher than the values of both metastable equilibrium bcc-Cu and equilibrium fcc-Cu phases.
Article
Chemistry, Physical
Song Bai, Xinlei Yi, Zhiyi Liu
Summary: In this study, the influence of Ag variations on initial cluster hardening and microstructure evolution in Al-Cu-Mg-Ag alloys was investigated. The results showed that increasing the Ag content promoted the formation of Mg-Ag co-clusters, leading to a higher nucleation rate of Sl phase and denser Sl precipitation, resulting in stronger age-hardening response. Mg-Ag co-clusters exhibited the greatest strengthening contribution to yield strength as the bulk Ag content increased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
T. K. Akopyan, N. A. Belov, N. Letyagin, F. O. Milovich, A. A. Lukyanchuk, A. S. Fortuna
Summary: The addition of indium trace has a significant impact on the structure and precipitation hardening response of Al-Si-Cu based casting alloy. Finer theta' phase precipitates with higher number density and spherical nanoparticles are formed in the alloy with trace addition. Uniaxial compression tests of peak aged samples show that the alloy with trace solute exhibits significantly higher yield strength compared to the base alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Eduardo Perez-Badillo, Hector J. Dorantes-Rosales, Maribel L. Saucedo-Munoz, Victor M. Lopez-Hirata
Summary: This study focused on analyzing phase transformation in Fe-Ni-Al alloys using a diffusion couple of Ni/Fe-Ni-Al/Fe and Calphad-based diffusion and thermodynamic software. Diffusion couples were prepared by annealing at 1100 degrees C for 200 h and then air-cooled. The results showed that the diffusion path between Ni or Fe pure metal and the Fe-33at.%Ni-33at.%Al alloy is not linear. Aging at 750 degrees C promoted inverse precipitation beta'-> beta' + alpha, causing the softening of the alloy. Normal precipitation reactions, alpha ->alpha +beta' and gamma -> gamma +gamma', were also observed during aging at 750 degrees C, resulting in precipitation hardening.
Article
Materials Science, Multidisciplinary
S. Medrano, H. Zhao, B. Gault, F. De Geuser, C. W. Sinclair
Summary: The softening and strengthening effects in pre-deformed and aged Al-Mg-Cu alloys were evaluated using microscopy, mechanical testing and modeling. A refined model for work hardening response was found to accurately determine the precipitation hardening contribution. The mechanical response of these alloys was not significantly affected by Cu content, pre-deformation level or aging temperature, indicating robustness in terms of composition variations.
Article
Materials Science, Multidisciplinary
Sohail Shah, Akash Gopal, Elisabeth Thronsen, Constantinos Hatzoglou, Bjorn Holmedal
Summary: Comparison between natural and artificial ageing treatments with cyclic deformation ageing at room temperature revealed different fracture behaviors and mechanical responses for Al-Zn-Mg alloys. Cyclic ageing resulted in early slant shear fracture, while natural ageing improved mechanical properties.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Sohail Shah, Elisabeth Thronsen, Constantinos Hatzoglou, Sigurd Wenner, Calin D. Marioara, Randi Holmestad, Bjorn Holmedal
Summary: Cyclic ageing at room temperature enhances the mechanical properties of aluminum alloys by continuously injecting vacancies and enabling the dynamic precipitation of fine solute clusters. These clusters, uniformly distributed throughout the material, exhibit structural similarities to GPI zones observed after low temperature ageing. The strengthening effect of solute clusters is accelerated during cyclic ageing compared to natural ageing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Qingdong Liu, Hui Song, Jing Zhang, Jiaxin Ding, Yihua Chen, Jianfeng Gu
Summary: The novel ultralow carbon precipitation-hardening Ni-Mn-Cu-Al-Co ferritic steel was designed to investigate the co-precipitation behaviors of Cu-rich and beta-NiAl precipitates. Nanoscale clusters and precipitates formed at 450 and 500 degrees C tempering are responsible for the strong precipitation strengthening effect. The strength contributions from dislocated martensite, solid solution, and precipitation were compared with experimental values, with precipitation hardening found to be dominant.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Chunhui Liu, Yihui Zhou, Peipei Ma, Jun He, Longhui Chen
Summary: The artificial ageing of a commercial Al-Cu-Li-Mg alloy was studied at temperatures of 160-240 degrees C with and without prior natural ageing. The study used hardness testing, high-angle annular dark-field scanning transmission electron microscopy and energy-dispersive spectroscopy. It was found that the peak hardness decreased significantly with increasing artificial ageing temperature in the absence of natural ageing. However, natural ageing enhanced the hardening potential during elevated temperature artificial ageing. It achieved this by refining T1 precipitates and promoting the precipitation of Cu/Mg-rich sigma phases in the grain interiors, while having negligible effects on inter-granular precipitation.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Qin Shen, Daozhu Huang, Wenqing Liu, Fangjie Li, Qiang Lu
Summary: This study investigated the nanoscale precipitation and mechanical properties of two CuNiAl-containing steels with different Cu contents aged at 500 degrees C. The results showed that the coprecipitation of Cu-rich and NiAl phases during aging contributed to precipitation strengthening effects. The influence of Cu content on the evolution of precipitates was studied using atom probe tomography (APT). The results demonstrated that increasing Cu content enhanced the number density of precipitates and accelerated the precipitation process. The two steels exhibited different precipitation sequences based on their Cu contents. Steel 1 with low Cu content exhibited a precipitation sequence of supersaturated solid solution, NiAl, NiAl + Cu, while Steel 2 with high Cu content presented a sequence of supersaturated solid solution, Cu, Cu + NiAl. After further aging, the precipitates in both steels transformed into Cu/NiAl co-precipitates without isolated Cu-rich phases and isolated NiAl phases.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Chun-Hao Peng, Po-Yu Hou, Woei-Shyang Lin, Pai-Keng Shen, Hao-Hsuan Huang, Jien-Wei Yeh, Hung-Wei Yen, Cheng-Yao Huang, Che-Wei Tsai
Summary: A Cu-Ni-Si-Fe copper alloy was prepared and studied for its hardness, electrical conductivity, and wear resistance. The addition of Fe led to the formation of Cu-Ni-Si intermetallic compounds, which improved the alloy's mechanical and physical properties. The alloy showed excellent performance, with hardness of 314 HV and conductivity of 22.2% IACS, comparable to C17200 alloy. Additionally, the alloy exhibited significantly improved dry sliding wear resistance, with a 208% increase compared to the C17200 alloy.
Article
Materials Science, Multidisciplinary
Mingkun Jiang, Ying Han, Jiapeng Sun, Guoqing Zu, Weiwei Zhu, Yu Zhao, Hua Chen, Xu Ran
Summary: In this study, different microscopic techniques were used to characterize the precipitation behavior of the Cu-rich phase in Al-free and Al-containing ferrite stainless steels. The effects of Al addition on the precipitation and coarsening of the Cu-rich phase were analyzed. The results showed that Al increased the nucleation rate of the Cu-rich phase and refined the Cu-rich nanoprecipitates. The crystal structures of the Cu-rich phase changed after Al addition. The Al-containing Cu-rich phase had high-density edge dislocations, which acted as diffusion channels and increased the coarsening rate of the Cu-rich phase. However, with the extension of the aging time, the dislocation density in the Al-containing Cu-rich phase decreased, weakening the promotion effect of Al on the coarsening of the Cu-rich phase.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Tong Xi, Xinrui Zhang, Xueliang Yin, Chunguang Yang, Ke Yang
Summary: The behavior of Cu-rich precipitates in 316LN-Cu SS austenitic stainless steel aged at 600, 700, and 800 degrees Celsius was systematically studied. The Cu-rich precipitates were found to increase the hardness and strength of the steel, with optimal strength and elongation observed in specimens aged at 700 degrees Celsius for 6 hours. The study also revealed significant changes in the size and composition of the precipitates, as well as interface segregation effects that influenced interfacial free energies.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Peng Zhang, Yingjie Feng, Yi Li, Wei Pan, Peng-an Zong, Muzhang Huang, Yi Han, Zesheng Yang, Hao Chen, Qianming Gong, Chunlei Wan
SCRIPTA MATERIALIA
(2020)
Letter
Metallurgy & Metallurgical Engineering
Cong-Yu Zhang, Hao Chen, Jia-Ning Zhu, Chi Zhang, Zhi-Gang Yang
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2020)
Article
Metallurgy & Metallurgical Engineering
Lei-Lei Xing, Cong-Cong Zhao, Hao Chen, Zhi-Jian Shen, Wei Liu
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2020)
Article
Multidisciplinary Sciences
Ran Ding, Yingjie Yao, Binhan Sun, Geng Liu, Jianguo He, Tong Li, Xinhao Wan, Zongbiao Dai, Dirk Ponge, Dierk Raabe, Chi Zhang, Andy Godfrey, Goro Miyamoto, Tadashi Furuhara, Zhigang Yang, Sybrand van der Zwaag, Hao Chen
Article
Materials Science, Multidisciplinary
Geng Liu, Zongbiao Dai, Zhigang Yang, Chi Zhang, Jun Li, Hao Chen
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Nanoscience & Nanotechnology
Yunhe Yu, Zhengdong Liu, Chi Zhang, Zhongding Fan, Zhengzong Chen, Hansheng Bao, Hao Chen, Zhigang Yang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Chemistry, Physical
Binhan Sun, Wenjun Lu, Baptiste Gault, Ran Ding, Surendra Kumar Makineni, Di Wan, Chun-Hung Wu, Hao Chen, Dirk Ponge, Dierk Raabe
Summary: By utilizing chemically heterogeneous microstructures, the resistance of high-strength steel against hydrogen embrittlement can be enhanced without sacrificing strength or ductility.
Article
Nanoscience & Nanotechnology
Shichun Liu, Haokai Dong, Yubo Li, Zhigang Yang, Hao Chen
Summary: This study explores the potential effects of flash annealing on the microstructure and mechanical properties of cold-rolled NANOHITEN ferritic steel. The process results in an ultrafine-grained heterostructured matrix, composed of recrystallized/transformed and non-recrystallized/transformed domains, leading to a high strength level of 1 GPa without significant loss in ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jugan Zhang, Huihan Chen, Hanwei Fu, Yinan Cui, Chenchong Wang, Hao Chen, Zhigang Yang, Wenquan Cao, Jianxiong Liang, Chi Zhang
Summary: High-strength steels with large numbers of spherical carbides greatly affect fatigue performance. Previous studies suggested that refining carbides could improve fatigue performance, but this may not be true for submicron sized carbides. This study found that an optimum submicron carbide size exists and investigated the mechanism behind its effect on fatigue performance. Based on these findings, a new quantitative evaluation model was proposed, providing theoretical guidance for the microstructure design of submicron carbides.
Article
Materials Science, Multidisciplinary
Ran Ding, Chaofan Zhang, Yan Wang, Chenxi Liu, Yingjie Yao, Jun Zhang, Zhigang Yang, Chi Zhang, Yongchang Liu, Hao Chen
Summary: Recent research has shown that manipulating chemical heterogeneity in steels can effectively tailor retained austenite and create novel microstructures. However, the mechanistic role of chemical heterogeneity in austenite decomposition and stabilization is not fully understood. This study investigates the potential effects of Mn heterogeneity on austenite decomposition and stabilization in a commercial Quenching and Partitioning (Q&P980) steel. The results show a strong kinetic interaction between the Mn enriched region in austenite and the migrating austenite/ferrite interface upon cooling, which can significantly affect carbon partitioning and stability.
Article
Engineering, Manufacturing
Xiaopei Wang, Weiting Li, Yingjie Yao, Luyao Fan, Jinhua Wang, Weiyi Wang, Pengyu Wen, Zhigang Yang, Hao Chen
Summary: In this study, low-density ultrahigh-strength steels (LD-UHSS) were designed and fabricated using laser powder bed fusion with in-situ alloying. The addition of aluminum reduced the density and significantly strengthened the LD-UHSS through the precipitation of the B2 phase. The laser additive manufacturing process resulted in the formation of fine metastable retained austenite, contributing to improved ductility. By tailoring key phases, the mechanical performance of LD-UHSS can be effectively optimized.
ADDITIVE MANUFACTURING
(2023)
Article
Nanoscience & Nanotechnology
Jinhua Wang, Shidong Wang, Weiting Li, Yingjie Yao, Xiaopei Wang, Zhigang Yang, Hao Chen
Summary: Selective laser melting is a promising method for manufacturing complex-shaped metallic parts. By investigating the manufacturing issues of conventional medium-carbon H13 steel, the critical role of austenite stability in cracking behavior and ductility was revealed.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Boning Zhang, Kai Xiong, Maoqiu Wang, Zhenbao Liu, Kun Shen, Yong Mao, Hao Chen
Summary: This study investigates solute-hydrogen interactions at different grain boundaries using first-principles calculations, and identifies effective descriptors for grain boundary engineering strategies, providing fundamental insights for designing high-performance alloys resistant to hydrogen embrittlement.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Haokai Dong, Yongjie Zhang, Goro Miyamoto, Hao Chen, Zhigang Yang, Tadashi Furuhara
SCRIPTA MATERIALIA
(2020)
Article
Chemistry, Physical
Kun Shen, Yixuan Wang, Jun Zhang, Yi Zong, Gengwei Li, Changchun Zhao, Hao Chen
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)